JP2016534633A - Identifying channels for network communication - Google Patents

Abstract

A communication device configured to identify a channel for network communication is disclosed. For example, a device operable in a wireless communication network receives a message identifying a list of channels operating in the network, removes at least one channel from the list of channels, and removes at least one for communication with the network. The channel can be identified from a list of channels other than the registered channel. Even if the network can utilize one or more channels that are not supported by the device, the device can increase the likelihood that it will acquire the network. Other aspects, embodiments, and features are also disclosed and claimed.

Description

Cross-reference of related applications

  [0001] This application was filed with the provisional patent application No. 61 / 869,534 filed with the USPTO on August 23, 2013, and with the USPTO on February 21, 2014. No. 14 / 186,734, which is hereby incorporated by reference in its entirety.

  [0002] The techniques described below relate generally to wireless communication, and more specifically, but not limited to, identifying channels in a wireless communication network. Technology realization can provide efficient channel acquisition (eg, during roaming scenarios) for reliable user experience and efficient use of power resources.

  [0003] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems can be accessed by various types of access terminals (eg, mobile devices) adapted to facilitate wireless communication, where multiple access terminals can utilize available system resources (eg, Share time, frequency, and power).

  [0004] System or channel acquisition is a process that a mobile device can use to establish a communication link or channel with a wireless network. To perform channel acquisition, the mobile device must first find an available channel that it can use. This can be achieved by receiving an overhead message including a list of available channels and selecting an available channel.

  [0005] As the demand for mobile broadband access continues to increase, R & D continues to promote technology not only to meet the growing demand for mobile broadband access, but also to promote and improve the mobile communications user experience .

  [0006] The following presents a simplified summary of one or more aspects of the disclosure in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated features of the present disclosure, but is intended to identify the scope of any or all aspects of the present disclosure to identify key or critical elements of all aspects of the present disclosure. It is not intended to be described. Its sole purpose is to present some concepts of one or more aspects of the disclosure in a simplified form as a prelude to the more detailed description that is presented later.

  [0007] Various aspects of the disclosure provide for identifying a channel for communication with a network based on a list of channels operating in the network. A device such as an access terminal that receives the list autonomously removes channels in the list that are not supported by the device. For example, a low cost device may simply have a limited hardware configuration that supports some of the channels operating in the network. The device identifies channels for communication with the network from the list of channels, except for removed channels. In this way, even if the network can utilize one or more channels that are not supported by the device, the device may increase the likelihood that it will acquire the network. it can.

  [0008] For example, in one aspect, the present disclosure provides a method of wireless communication operable at an access terminal. The method receives a message identifying a list of active channels in a network and removes at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels. Generating a channel subset list and identifying a channel from the channel subset list to establish communication with the network.

  [0009] Another aspect of the present disclosure is for wireless communication including at least one processing circuit, a memory coupled to the at least one processing circuit, and a communication interface coupled to the at least one processing circuit. A configured device is provided. At least one processing circuit receives at least one message identifying a list of active channels in the network and at least one from the list of channels without negotiating with the network to remove at least one channel from the list of channels. Removing the channel is configured to generate a channel subset list and to identify the channel from the channel subset list to establish communication with the network.

  [0010] Another aspect of the present disclosure provides an apparatus configured for wireless communication. The apparatus includes means for receiving a message identifying a list of active channels in the network and at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels. Means for removing to generate a subset list of channels and means for identifying a channel from the subset list of channels to establish communication with the network.

  [0011] Another aspect of the present disclosure is that a communication device receives a message identifying a list of active channels in the network and negotiates with the network to remove at least one channel from the list of channels. Code for causing a channel subset list to be generated by removing at least one channel from the channel list and identifying a channel from the channel subset list to establish communication with the network. A product comprising a computer readable storage medium is provided.

  [0012] These and other aspects of the present disclosure will be fully appreciated upon review of the detailed description that follows. Other aspects, features, and embodiments of the present disclosure will become apparent to those of ordinary skill in the art upon review of the following description of specific exemplary embodiments of the present disclosure in conjunction with the accompanying drawings. The features of the present invention may be described with reference to certain specific embodiments and figures below, but all embodiments of the present disclosure include one or more of the advantageous features described herein. Can do. In other words, one or more embodiments may be described as having certain advantageous features, but one or more of such features may also be various embodiments of the disclosure described herein. Can be used according to. In a similar manner, exemplary embodiments may be described below as device, system, or method embodiments, although such illustrative embodiments may be implemented in various devices, systems, and methods. It should be understood that

[0013] FIG. 1 is a block diagram illustrating an example of a network environment in which one or more aspects of the present disclosure may find an application. [0014] FIG. 2 is a block diagram illustrating an example of a protocol stack architecture that may be implemented by an access terminal. [0015] FIG. 3 is a block diagram illustrating an example of a network environment configured to identify a channel for an access terminal to communicate with an access network. [0016] FIG. 4 is a flowchart illustrating a method of wireless communication between an access terminal and a network in accordance with certain aspects of the present disclosure. [0017] FIG. 5 is a block diagram illustrating a selection component of an access terminal in accordance with at least one example. [0018] FIG. 6 is a flowchart illustrating a method of identifying a channel for communication with a network in accordance with certain aspects of the present disclosure. [0019] FIG. 7 is a flowchart illustrating a further aspect of a method for identifying a channel for communication with a network in accordance with certain aspects of the present disclosure. [0020] FIG. 8 is a flowchart illustrating a further aspect of a method for identifying a channel for communication with a network in accordance with certain aspects of the present disclosure. [0021] FIG. 9 is a flowchart illustrating a method of wireless communication between an access terminal and a network in accordance with certain aspects of the present disclosure. FIG. 10 is a block diagram illustrating an example of a base station that communicates with an access terminal in a communication network.

Detailed description

  [0023] The description set forth below in connection with the accompanying drawings is intended as a description of various configurations, and represents the only configurations in which the concepts and features described herein may be implemented. Not intended. The following description includes specific details to provide a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known circuits, structures, techniques and components are shown in block diagram form in order to avoid obscuring the concepts and features described.

  [0024] Various concepts presented throughout this disclosure may be implemented across a wide variety of wireless communication systems, network architectures, and communication standards. Certain aspects of the discussion are described below for Code Division Multiple Access (CDMA) and Third Generation Partnership Project 2 (3GPP2®) 1x protocols and systems, and related terms are found in much of the description below. Can be. However, one of ordinary skill in the art will recognize that one or more aspects of the present disclosure may be used and included in one or more other wireless communication protocols and systems.

  [0025] FIG. 1 is a block diagram illustrating an example network environment in which one or more aspects of the present disclosure may find an application. The wireless communication system 100 generally includes a public switched telephone network (PSTN) and / or (eg, a packet data switching node (PDSN)) (eg, via a mobile switching center / visitor location register (MSC / VLR)). Core network 108, one or more base station controllers (BSC) 106, one or more access terminals (AT) 104, and one or more that provide access to an Internet Protocol (IP) network) A base station 102 is included. The system 100 may support operation on multiple carriers (different frequency waveform signals). A multi-carrier transmitter can transmit simultaneously modulated signals on multiple carriers. Each modulated signal may be a CDMA signal, a time division multiple access (TDMA) signal, an orthogonal frequency division multiple access (OFDMA) signal, a single carrier frequency division multiple access (SC-FDMA) signal, and so on. Each modulated signal may be sent on a different carrier and may carry control information (eg, pilot signals), overhead information, data, etc.

  [0026] Base station 102 can communicate wirelessly with access terminal 104 via a base station antenna. Each base station 102 can be generally implemented as an apparatus adapted to facilitate wireless connectivity (of one or more access terminals) to the wireless communication system 100. Base station 102 may be accessed by those skilled in the art from an access point, base transceiver station (BTS), radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), Node B, femto cell, pico cell. , And / or any other suitable terminology.

  [0027] Base station 102 is configured to communicate with access terminal 104 under the control of base station controller 106 via a plurality of carriers. Each of the base stations 102 can provide communication coverage for a respective geographic area. The coverage area 110 for each base station 102 here is identified as a cell 110-a, 110-b, or 110-c. The coverage area 110 for the base station 102 may be divided into sectors (not shown, but constituting only part of the coverage area). In the sector-divided coverage area 110, the multiple sectors in the coverage area 110 are formed by a group of antennas with each antenna involved in communication with one or more access terminals 104 in part of the cell. Can do.

  [0028] One or more access terminals 104 may be scattered throughout the coverage area 110 and may communicate wirelessly with one or more sectors associated with each base station 102. Access terminal 104 may generally include one or more devices that communicate with one or more other devices through wireless signals. Such an access terminal 104 may be user equipment (UE), mobile station (MS), subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device by those skilled in the art. , Remote device, mobile subscriber station, mobile terminal, wireless terminal, remote terminal, handset, terminal, user agent, mobile client, client, or some other suitable term. Access terminal 104 may include a mobile terminal and / or at least a substantially fixed terminal. Examples of access terminals 104 are mobile phones, pagers, wireless modems, personal digital assistants, personal information managers (PIMs), personal media players, palmtop computers, laptop computers, tablet computers, televisions, appliances, electronic Book readers (e-readers), digital video recorders (DVRs), machine-to-machine (M2M) devices, entertainment devices, sensors, wireless appliances, and / or at least partially wireless or cellular Includes other communication / computing devices communicating over a network.

  [0029] Access terminal 104 may be adapted to use a protocol stack architecture for communicating data between one or more network nodes of wireless communication system 100 (eg, base station 102) and access terminal 104. . The protocol stack generally includes a conceptual model of a layered architecture for communication protocols in which layers are represented in their numeric designation order, where transferred data is displayed in their representation. In turn, it is processed substantially by each layer. According to the figure, the “stack” is typically indicated vertically by the layer having the lowest numerical representation at the base. FIG. 2 is a block diagram illustrating an example protocol stack architecture that may be implemented by access terminal 104. Referring to FIGS. 1 and 2, a protocol stack architecture for access terminal 104 generally includes three layers: layer 1 (L1), layer 2 (L2), and layer 3 (L3). Has been.

  [0030] Layer 1 202 is the lowest layer and implements various physical layer signal processing functions. Layer 1 202 is also referred to herein as physical layer 202. This physical layer 202 provides radio signal transmission and reception between the access terminal 104 and the base station 102.

[0031] A data link layer, referred to as layer 2 (or "L2 layer") 204, is located above the physical layer 202 and is responsible for the delivery of signaling messages generated by layer 3. The L2 layer 204 uses the service provided by the physical layer 202. The L2 layer 204 may include two sublayers: a medium access control (MAC) sublayer 206 and a link access control (LAC) sublayer 208.
[0032] The MAC sublayer 206 is a lower sublayer of the L2 layer 204. The MAC sublayer 206 implements the medium access protocol and is involved in transporting protocol data units associated with higher layers by using services provided by the physical layer 202. The MAC sublayer 206 may manage access of data from higher layers to the shared air interface. The MAC sublayer 206 may also include or interface with radio link protocol (RLP) functions, multiplexing functions, and QoS functions.

  The LAC sublayer 208 is an upper sublayer of the L2 layer 204. The LAC sublayer 208 implements a data link protocol that provides for the delivery and accurate transport of signaling messages generated at Layer 3. The LAC sublayer 208 uses services provided by lower layers (eg, layer 1 and MAC sublayer).

[0034] Layer 3 210, which may also be referred to as an upper layer or L3 layer, causes and terminates signaling messages according to the timing and semantics of the communication protocol between the base station 102 and the access terminal 104. The L3 layer 210 uses a service provided by the L2 layer. Information (eg, voice service, data service, and signaling) messages are also passed to the L3 layer 210.
System / channel acquisition
[0035] System or channel acquisition is a standard process that an access terminal can utilize to establish a communication channel with an access network. To perform channel acquisition, the access terminal must first find an available channel that the access terminal can use to communicate with the access network.

  [0036] 3GPP2 C.I., which is incorporated herein by reference. S0024-B v3.0 (September 2009) is a cdma2000 high-rate packet data air interface specification that defines certain aspects of the Evolved Voice-Data Optimized (EVDO) air interface. To do. According to this specification, certain overhead messages (ie, sector parameter (SP) messages) transmitted from the access network inform a list of CDMA channels operating on the access network. When an access terminal receives an SP message from the access network, the access terminal generally selects a CDMA channel from the list of channels provided on the SP message and tunes to the selected CDMA channel accordingly. ). If more than one channel is available as indicated in the SP message, the access terminal may use a CDMA channel selection algorithm (eg, a hash function) to calculate an index for the channel list provided in the SP message. Use. Basically, by utilizing this hash function, the access network can distribute various access terminals to different channels, so that all access terminals do not become the same channel.

  [0037] In a conventional system, the access terminal and the access network independently execute the same hash algorithm so that they select the same channel. According to the 3GPP2 standard, different hash algorithms can be performed by access terminals and access networks that depend on the idle state protocol subtype used by the access terminal and access network. If the access terminal and access network negotiate with a subtype other than the default idle protocol, the access terminal and access network will remove the unsupported channels listed in the SP message before hashing. However, if the access terminal and access network use the default idle state protocol, both the access terminal and access network perform a hash function on all channels listed in the SP message.

  [0038] Some hardware implementations of access terminals are configured to support a limited number of channels or band classes (in EVDO, a band class is a group of channels). For example, a low cost access terminal may simply be configured to support one specific band class. However, the access network may list channels from several bands in the SP message. For example, 3GPP2 defines 20 or more band classes.

  [0039] Furthermore, an access terminal that has not established an EVDO session with the access network uses a default idle state protocol with default settings. Thus, in some scenarios, the access terminal may select a channel that it does not support (ie, the hash algorithm may hash against a channel that is not supported). In such a case, the access terminal may not be able to receive the EVDO service even if a supported channel is available in that area.

  [0040] As an example, assume that the access terminal supports only BandClass (BC) 0. If this access terminal enters the sector with both BC0 and BC1 channels listed in the SectorParameters (SP) message, the access terminal may hash to the BC1 channel, and accordingly, the access terminal The access terminal will fail to acquire the network because it lacks hardware to support. After the access terminal fails to tune to the BC1 channel, if there is no other BC0 channel that the access terminal can reacquire, the above procedure is repeated and the access terminal may repeatedly fail to acquire service There is sex.

  [0041] According to aspects of this disclosure, prior to performing channel selection (eg, performing a hash algorithm), the access terminal may receive one or more from a received channel list (eg, identified in an SP message). Unsupported channels can be removed autonomously. For example, if the access terminal has not yet negotiated an EVDO session with the network, the access terminal can autonomously remove the unsupported channel (s). In this way, channel selection results in the access terminal selecting a supported channel, thereby enabling communication with the network.

  [0042] FIG. 3 illustrates a high-level example of functions and signaling for an access terminal 304 and an access network 302 (eg, a base station) according to aspects of this disclosure. The access network 302 maintains a channel list 306 that lists each channel currently operating in the access network 302. The access network 302 also broadcasts a message 308 that includes a channel list.

  [0043] The access terminal 304 removes unsupported channels from the received channel list and lists supported channels list 312 (eg, a subset of the channel list 306) that lists the channels supported by the access terminal 304. A channel removal function 310 is stored. The access terminal also selects a channel selection function 314 (eg, a hash algorithm) that selects a channel 316 that will be used by the access terminal 304 from the supported channel list 312 to initiate communication 322 with the access network 302. Execution).

  [0044] For example, the access terminal 304 selects a supported channel from the list of channels by performing a hash algorithm after removing the unsupported channel from the list of channels identified in the received SP message. can do. The access terminal may then use this selected channel to negotiate an EVDO session with the access network 302.

  [0045] Similarly, the access network 302 selects a channel selection function 318 () that selects a channel 320 that is predicted to be used by the access terminal 304 from the channel list 306 to initiate communication 322 with the access network 302. For example, execution of a hash algorithm). As described above, the access terminal 304 and the access network 302 each independently execute the same hash algorithm in an attempt to reach the same result. Thus, as a side effect of autonomous removal of one or more unsupported channels by access terminal 304, the hash result may be different between access terminal 304 and access network 302 prior to session negotiation. However, access network 302 generally does not attempt to page access terminal 304 prior to EVDO session negotiation. Thus, as described above, after selecting a supported channel, the access terminal 304 can communicate with the access network 302 using the selected channel to negotiate an EVDO session.

  [0046] If a non-default idle protocol subtype (eg, extended idle protocol) is negotiated for an EVDO session, the access terminal 304 and the access network 304 both remove unsupported channels, Eventually the same hashed channel may be selected. If the default idle protocol is negotiated during session negotiation and an unsupported channel is selected by the hash algorithm, the access terminal may still lose the system after the session negotiation. However, this result is compliant with the 3GPP2 standard.

  [0047] Advantageously, by removing unsupported channels from the list of received channels as taught herein, an access terminal may obtain service from a particular access network. It will be high. Such a scheme offers significant advantages by allowing access terminals to hash only on supported channels, especially in roaming scenarios, thereby providing an opportunity to negotiate an access network and an extended idle state protocol. Can be obtained. Furthermore, such a scheme can reduce the power consumption of the access terminal. In general, the access terminal will intermittently attempt to acquire the network until it succeeds. Therefore, since an access terminal that has not acquired a network repeatedly attempts to acquire a network, it may consume a relatively large amount of power. By removing unsupported channels from the list of received channels as taught herein, the access terminal increases the opportunity to acquire its network. Thus, the access terminal can spend more time in the IDLE mode, thereby reducing its power consumption.

  [0048] FIG. 4 is a flowchart illustrating an example process 400 in accordance with aspects of the present disclosure. In some examples, process 400 may be implemented by access terminal 104 (eg, access terminal 304). In another example, process 400 may be implemented by any suitable apparatus or means for performing the functions described herein.

  [0049] At block 402, the access terminal may receive one or more overhead messages. For example, the access terminal may receive a sector parameter (SP) message reporting a list of CDMA channels operating on the network. Here, the access terminal may store the received list of channels in memory.

  [0050] At block 404, the access terminal may determine whether any of the channels listed in the received overhead message are not supported. For example, an access terminal may be configured to support only a limited set of channels and / or band classes, and accordingly, any one or more of the listed channels of supported channels. To determine if not in the list, the list of channels in the received list may be compared to the list of supported channels.

  [0051] If one or more channels in the received list are not supported, at block 406, the access terminal may remove one or more unsupported channels from the list of channels. For example, if a list of received channels is stored in memory, the list in memory may be updated to not include unsupported channels. In another example, a second list may be generated that includes only supported channels from the list of channels received in the SP message. Thus, in some aspects, the operation of block 406 involves generating a subset list of channels that excludes channels that are not supported by the access terminal.

  [0052] At block 408, the access terminal may perform a hash algorithm to select a channel utilizing a channel list that excludes channels not supported by the access terminal. As a result of performing the hash algorithm, the access terminal may select a channel, and at block 410, the access terminal may negotiate an EVDO session utilizing the selected channel.

  [0053] Upon session negotiation in block 410, the access network may be informed of the idle protocol subtype currently used by the access terminal. Thus, both the access terminal and the access network can run (execute) the same hash algorithm, thereby agreeing on a common channel used for subsequent communication between these nodes ( agree on).

  [0054] FIG. 5 is a diagram of an example apparatus 500 (eg, access terminal 104) configured in accordance with one or more aspects of the present disclosure. The apparatus 500 includes a communication interface (eg, at least one transceiver) 502, a storage medium 504, a user interface 506, a memory 508, and processing circuitry 510. These components can be coupled to each other and / or placed in electrical communication with each other via a signaling bus or other suitable component. Specifically, each of communication interface 502, storage medium 504, user interface 506, and memory 508 is coupled to and / or placed in electrical communication with processing circuit 510.

  [0055] Communication interface 502 may be adapted to facilitate wireless communication of apparatus 500. For example, the communication interface 502 may include circuitry and / or programming adapted to bi-directionally facilitate communication of information regarding one or more communication devices in the network. Communication interface 502 may be coupled to one or more antennas 512 for wireless communication within a wireless communication system. The communication interface 502 can be comprised of one or more stand-alone receivers and / or transmitters and one or more transceivers. In the example shown, communication interface 502 includes a transmitter 514 and a receiver 516.

  [0056] Memory 508 may represent one or more memory devices. As shown, memory 508 may store a supported channel list 518 along with other information used by device 500. In some implementations, the memory 508 and the storage medium 504 are implemented as a common memory component. Memory 508 may also be used to store data that is manipulated by processing circuit 510 or some other component of apparatus 500.

  [0057] The storage medium 504 is one or more computer-readable for storing programming, such as processor-executable code or instructions (eg, software, firmware), electronic data, databases, or other digital information. It may represent a machine readable and / or processor readable device. Storage medium 504 may also be used to store data that is manipulated by processing circuitry 510 when performing programming. Storage medium 504 is accessed by a general purpose or special purpose processor including a portable or fixed storage device, an optical storage device, and various other media that can store, include, or carry programming. It can be any available media that can.

  [0058] By way of example, and not limitation, storage medium 504 includes a magnetic storage device (eg, hard disk, floppy disk, magnetic strip), optical disk (eg, compact disk (CD), or digital versatile disk). (DVD)), smart card, flash memory device (eg, card, stick, or key drive), random access memory (RAM), read only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM) Software and / or instructions that can be accessed and read by an electrically erasable PROM (EEPROM®), registers, storage devices including removable disks, or computers or communication devices It may comprise any other suitable storage device for 憶. The storage medium 504 may be embodied in a product (eg, a computer program product). By way of example, a computer program product may include a computer readable medium in packaging material. Thus, in some implementations, the storage medium may be a non-transitory (eg, tangible) storage medium.

  [0059] Alternatively, in some implementations, a computer-readable medium is, for example, a carrier wave, a transmission line, and any other suitable medium for transmitting software and / or instructions that can be accessed and read by a computer. Can be included.

  [0060] The storage medium 504 may be coupled to the processing circuit 510 such that the processing circuit 510 can read information from the storage medium 504 and write information to the storage medium 406. That is, storage medium 504 can be coupled to processing circuit 510 such that storage medium 504 is at least accessible by processing circuit 510, which is an example where at least one storage medium is integrated into processing circuit 510. And / or examples where at least one storage medium is separated from processing circuitry 510 (eg, internal to device 500, distributed outside device 500, distributed across multiple entities).

  [0061] The programming stored by storage medium 504, when executed by processing circuit 510, causes processing circuit 510 to perform one or more of the various functions and / or processing steps described herein. Make it. For example, the storage medium 504 may utilize a communication interface 502 for coordinating the operation of one or more hardware blocks of the processing circuit 510 as well as for wireless communication utilizing their respective communication protocols. , May comprise configured actions.

  [0062] The processing circuit 510 is generally adapted for processing including execution of such programming stored on the storage medium 504. As used herein, the term “programming” or “code”, whether referred to in software, firmware, middleware, microcode, hardware description language, or otherwise, includes, without limitation, instructions, Instruction set, data, code, code segment, program code, program, subprogram, software module, application, software application, software package, routine, subroutine, object, execution file, execution thread, procedure, function, programming, etc. It should be interpreted broadly to include.

  [0063] The processing circuitry 510 is arranged to acquire, process, and / or transmit data, control data access and data storage, issue commands, and control other desired operations. The processing circuit 510 may include circuitry configured to achieve the desired programming provided by a suitable medium in at least one example. For example, the processing circuitry 510 may be implemented as one or more processors, one or more controllers, and / or other structures configured to execute executable programming. Examples of processing circuitry 510 are general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic components, discrete gate or transistor logic, discrete hardware components. Or any combination of these designed to perform the functions described herein. A general purpose processor may include a microprocessor, as well as any conventional processor, controller, microcontroller, or state machine. The processing circuit 510 may also be a combination of computing components such as a DSP and macroprocessor, multiple microprocessors, one or more microprocessors coupled to a DSP core, a combination of ASICs and microprocessors, or any other many It can be realized as various configurations. These examples of processing circuitry 510 are for illustration and other suitable configurations within the scope of this disclosure are also contemplated.

  [0064] In accordance with one or more aspects of the present disclosure, the processing circuitry 510 may include any or all features, processes, functions, steps, and / or for any or all of the devices described herein. Can be adapted to perform routines. As used herein, the term “adapted” in connection with processing circuit 510 refers to the particular process, function, step, and step by which processing circuit 510 is in accordance with various features described herein. One or more of configuration, adoption, implementation, and / or programming may be performed to perform a routine.

  [0065] According to at least one example of apparatus 500, processing circuitry 510 includes a module 520 for receiving a message, a module 522 for generating a subset list of channels, and a module 524 for identifying channels. A module 526 for determining that the access terminal (AT) does not support one or more channels, and a module 528 for calculating the amount of channels.

  [0066] Module 520 for receiving a message may include circuitry and / or programming adapted to perform several functions related to, for example, receiving a message comprising a list of channels. One of these functions involves invoking the transfer of specific data from another component. For example, the receiver 516 of the apparatus 500 may be configured to monitor a broadcast signal from an access point and decode the broadcast signal to derive a message encoded with the broadcast signal. Another of these functions involves obtaining transferred data. For example, module 520 for receiving a message may receive a message comprising a list of channels from receiver 516. Another of these functions involves storing data for access by another component of the processing circuit or some other component of the apparatus 500. For example, the module 520 for receiving a message may store a message acquired with a previous function at a particular memory location in the memory 508. In some implementations, the programming comprises a module 530 for receiving messages stored on the storage medium 504.

  [0067] A module 522 for generating a channel subset list is adapted to perform a number of functions related to generating a channel subset list, eg, by removing channel entries from the channel list, and / Or may include programming. One of these functions involves obtaining a list of channels. For example, module 522 for removing at least one channel may retrieve a list of channels stored in memory 508 by module 520 for receiving a message. Another of these functions involves obtaining information indicating which channels should not be in the list. In some implementations, the access terminal removes channels from the list that are not supported by the access terminal. For example, a low cost access terminal may have a limited hardware configuration that only supports some of the channels operating in the network. Thus, a list of supported channels and / or a list of unsupported channels can be stored in memory 508 or in some other manner. Thus, the module 522 for removing at least one channel can search such a list to identify which channels should not be in the channel list used by the device 500. Another of these functions involves evaluating the list to determine whether to remove any channel. For example, the received list of channels can be compared to a list of supported channels (as described in the previous function) to identify the channels to be removed from the list of channels. Another of these functions involves removing channels as needed from the original channel list to generate a subset of the channel list. The act of removing a channel from the list, for example, removing a channel entry from the list, setting a parameter indicating that the channel has been removed from consideration, or creating a new list that does not include the removed channel Can be accompanied by. In some implementations, the programming comprises a module 532 for generating a subset list of channels stored on the storage medium 504.

  [0068] A module for identifying channels 524 is adapted to perform several functions related to identifying channels used for communication from a subset list of expected channels, for example, and / or Or it may include programming. One of these functions involves obtaining a subset list of channels. For example, upon receiving the list, the access terminal may store the list in a particular memory location. Thus, module 524 for identifying channels can retrieve this list from a particular memory location. Another of these functions involves obtaining input parameters for the algorithm. For example, the above 3GPP2 C.I. The channel selection hash algorithm specified in S0024-B v3.0 can use three input parameters: key (eg, access terminal identifier), de-correlation parameter, And the number of channels in the table from which the channel is selected. Each of these parameters can be stored in a particular memory location. Thus, the module 524 for identifying channels can retrieve these parameters from specific memory locations. Another of these functions involves invoking an algorithm that operates to identify the channel. For example, a hash algorithm may be invoked that selects a channel from a list based on input parameters obtained with previous functions. An example of such a hash algorithm is the above 3GPP2 C.I. Specified in S0024-B v3.0. Another of these functions involves outputting an indication of the identified channel. For example, the channel identifier identified by the hash algorithm described above may be stored in a particular memory location or passed to another function. In some implementations, the programming comprises a module 534 for identifying channels stored on the storage medium 504.

  [0069] Further, a module 526 for determining that an AT does not support one or more channels is a circuit adapted to perform several functions related to, for example, identifying channels not supported by the AT. And / or may include programming. One of these functions involves receiving an indication that a decision is made about a channel that is not supported by the AT. For example, the function of obtaining the channel list described above may generate an indication (eg, a function call) to determine if there are any channels that are not supported by the AT. Another of these functions involves obtaining information indicating which channels are supported by the AT and / or which channels are not supported by the AT. For example, a low cost access terminal may simply have a limited hardware configuration that supports some of the channels operating in the network. Thus, a list of supported channels and / or a list of unsupported channels can be stored in memory 508 or in some other manner. Thus, module 526 for determining that an AT does not support one or more channels searches such a list to identify which channels are supported by device 500 or not. can do. Another of these functions involves outputting an indication of one or more channels that are not supported by the AT. For example, the above indication may be stored in a particular memory location or passed to another function. In some implementations, the programming comprises a module 536 for determining that the AT (stored in the storage medium 504) does not support one or more channels.

  [0070] The module 528 for calculating the amount of channels is also adapted to perform several functions related to determining, for example, how many channels are listed in the channel list and / or Or it may include programming. One of these functions involves obtaining a channel list. For example, upon receiving the list, the access terminal may store the list in a particular memory location. Thus, module 528 for calculating the amount of channels can retrieve this list from a particular memory location. Another of these functions involves performing an algorithm that operates on the list to determine how many channels are listed in the channel list. For example, each channel entry in the list may be indicated by an entry number. In this case, determining how many channel entries are in the list may involve determining the highest entry number. Another of these functions involves outputting an indication of the number of channels listed in the channel list. For example, a number indicating the number of channels determined by the previous function can be stored in a particular memory location. In some implementations, the programming comprises a module 538 for calculating the amount of channels stored on the storage medium 504.

  [0071] As described above, the programming stored by the storage medium 504, when executed by the processing circuit 510, causes the processing circuit 510 to perform various functions and / or processing steps described herein. Have one or more done. For example, the storage medium 504 includes a module (eg, operation) 530 for receiving a message, a module 532 for generating a channel subset list, a module 534 for identifying a channel, and one access terminal (AT). One or more of a module 536 for determining not to support the above channels and a module 538 for calculating the amount of channels may be included.

  [0072] FIG. 6 illustrates a process 600 for channel identification operations in accordance with certain aspects of the present disclosure. Process 600 may occur within processing circuit 510 (FIG. 5), which may be located at an access terminal or some other suitable device. In another aspect, process 600 may be implemented by access terminal 104 shown in FIG. Of course, in various aspects within the scope of this disclosure, process 600 may be implemented by any suitable apparatus capable of supporting channel identification operations.

  [0073] At block 602, at some point, a message identifying a list of channels operating in the network is received. As described herein, in some implementations, the message is a 3GPP2 sector parameter message. Other types of messages can be received in implementations based on other technologies.

  [0074] At block 604, a subset list of channels is generated by removing at least one channel from the list of channels. This removal can be accomplished in various ways. In some implementations, channel entries are explicitly removed from the list to generate a subset list. For example, the entry for that channel may be deleted from the list. In some implementations, the channel is implicitly removed from the list to generate a subset list. For example, a channel entry is designated as being removed from a channel entry (eg, an entry is designated as excluded, invalid, deemed ineligible, etc.). Can be removed. Thus, in some aspects, the removal of at least one channel from the list of channels is excluded from consideration for each of the at least one channel from the list of channels establishing communication with the network. Can be stored.

  [0075] It should be noted that the removal is performed without negotiating with the network to remove at least one channel from the list of channels. That is, the access terminal autonomously removes at least one channel. For example, the operation of block 604 may be performed by an access terminal that has not negotiated an enhanced voice data optimization (EVDO) session with a network base station (eg, the access terminal operates under a default idle state protocol). ).

  [0076] At block 606, channels from a subset list of channels are identified to establish communication with the network. For example, a hash algorithm may be invoked to select one of the channels in the channel subset list. Thus, initial communication with a network (eg, an access network) can be established over the identified channel.

  [0077] FIG. 7 shows a process 700 for channel identification operations in accordance with another aspect of the present disclosure. Process 700 may occur within processing circuit 510 (FIG. 5), which may be located at an access terminal or some other suitable device. In another aspect, process 700 may be implemented by access terminal 104 shown in FIG. Of course, in various aspects within the scope of this disclosure, process 700 may be implemented by any suitable apparatus capable of supporting channel identification operations.

  [0078] At block 702, a message identifying a list of channels operating in the network is received. In some aspects, the operation of block 702 may be similar to the operation of block 602 described above.

  [0079] At block 704, a determination is made that the access terminal does not support one or more channels listed in the list of channels. For example, the operation of block 704 may involve determining that the access terminal hardware does not support one or more channels.

  [0080] At block 706, one or more channels that the access terminal does not support are removed from the list of channels to generate a subset list of channels. In some aspects, these operations may be similar to the operations of block 604 above.

  [0081] At block 708, channels from the subset list of supported channels are identified to establish communication with the network. Here, the supported channels comprise channels other than one or more removed channel (s). In some aspects, the operation of block 708 may be similar to the operation of block 606 described above.

  [0082] FIG. 8 shows a process 800 for channel identification operations in accordance with another further aspect of the disclosure. Process 800 may occur within processing circuit 510 (FIG. 5), which may be located at an access terminal or some other suitable device. In another aspect, process 800 may be implemented by access terminal 104 shown in FIG. Of course, in various aspects within the scope of this disclosure, process 800 may be implemented by any suitable apparatus capable of supporting channel identification operations.

  [0083] At block 802, a message identifying a list of channels operating in the network is received. In some aspects, the operation of block 802 may be similar to the operation of block 602 described above.

  [0084] At block 804, at least one channel is removed from the list of channels to generate a subset list of channels. In some aspects, the operation of block 804 may be similar to the operation of block 604 described above.

  [0085] At block 806, the amount of channels listed in the subset list of channels is calculated as a result of the removal of at least one channel from the list of channels. For example, the number of channels in the list supported by the access terminal can be determined.

  [0086] At block 808, a hash algorithm is performed to generate an index in the subset list of channels. Here, the amount of channels calculated in block 806 is an input parameter for the hash algorithm. As described herein, the hash algorithm may generate an index in the list of channels. For example, and without limitation, 3GPP2 C.I. A channel selection hash algorithm as specified in S0024-B v3.0 may be used here. Such a hash algorithm can use three input parameters: a key (eg, access terminal identifier), a decorrelation parameter, and the number of channels in the channel table. Based on these input parameters, the hash algorithm generates an index corresponding to one of the channels in the channel list.

  [0087] At block 810, a channel from the list of channels (after removal of block 804) is identified based on the index generated at block 808.

  [0088] FIG. 9 illustrates a process 900 for 3GPP2 communication operations in accordance with certain aspects of the present disclosure. Process 900 may occur within processing circuit 510 (FIG. 5), which may be located at an access terminal or some other suitable device. In another aspect, process 900 may be implemented by access terminal 104 shown in FIG. Of course, in various aspects within the scope of this disclosure, process 900 may be implemented by any suitable apparatus that can support communication operations.

  [0089] In block 902, initially, an EVDO session is not established. For example, the access terminal may have recently been powered on or reset, or the access terminal may have recently entered access network coverage. Furthermore, the access terminal may operate under a default idle state protocol.

  [0090] At block 904, a message identifying a list of channels operating in the network is received. In some aspects, the operation of block 904 may be similar to the operation of block 602 described above.

  [0091] At block 906, the channel is identified after removal of the unsupported channel from the list. In some aspects, the operation of block 906 may be similar to the operation of blocks 604 and 606 described above, and / or the operations of blocks 704-708.

  [0092] In block 908, communication is established with the base station via the channel identified in block 906. For example, an access terminal may attempt to receive a message from a base station on an identified channel and / or attempt to send a message to the base station.

  [0093] At block 910, EVDO session negotiation is performed. For example, the access terminal and base station may communicate on the channel identified in block 906 to establish an EVDO session. It should be noted that this negotiation takes place after removal of the channel (s) from the list at block 906. In some cases, the negotiation of block 910 may involve identifying another channel (other than the channel identified in block 906) for subsequent communication between the access terminal and the base station.

  [0094] FIG. 10 is a block diagram of an example base station 1010 in communication with an example access terminal 1050, where the base station 1010 can be the base station 102 of FIG. May be the access terminal 104 of FIG. For downlink communication, a controller or processor 1040 may receive data from a data source 1012. Channel estimation may be used by controller / processor 1040 to determine a coding, modulation, spreading, and / or scrambling scheme for transmit processor 1020. These channel estimates may be derived from a reference signal transmitted by access terminal 1050 or from feedback from access terminal 1050. Transmitter 1032 provides a variety of signal conditioning functions, including amplifying, filtering, and modulating onto a carrier for downlink transmission over a wireless medium through one or more antennas 1034. The antenna 1034 may include one or more antennas including, for example, a beam steering bi-directional adaptive antenna array, a MIMO array, or any other suitable transmission / reception technology.

  [0095] At access terminal 1050, receiver 1054 receives downlink transmissions through one or more antennas 1052, and processes the transmissions to recover the information modulated onto the carriers. Information recovered by receiver 1054 is provided to controller / processor 1090. Receive processor 1090 de-scrambles and de-spreads the symbols to determine the most likely signal constellation point transmitted by base station 1010 based on the modulation scheme. These soft decisions may be based on channel estimates calculated by the processor 1090. The soft decisions are then decoded and deinterleaved to recover the data, control, and reference signals. The CRC code is then checked to determine if the frame was successfully decoded. The data carried by the successfully decoded frame is then provided to a data sink 1072, which represents an application running on the access terminal 1050 and / or various user interfaces (eg, displays). The control signal carried by the successfully decoded frame is provided to the controller / processor 1090. If decoding of frames fails, the controller / processor 1090 may also use an acknowledgment (ACK) and / or negative acknowledgment (NACK) protocol to support retransmission requests for those frames.

  [0096] In the uplink, data from data source 1078 and control signals from controller / processor 1090 are provided. Data source 1078 may represent an application running on access terminal 1050 and various user interfaces (eg, a keyboard). Similar to the functions described in connection with downlink transmission by the base station 1010, the processor 1090 performs CRC codes, coding and interleaving to facilitate FEC, mapping to signal constellations, spreading using OVSF, And various signal processing functions, including scrambling to generate a series of symbols. Channel estimates derived by the processor 1090 from a reference signal transmitted by the base station 1010 or from feedback contained in the midamble transmitted by the base station 1010 may be appropriately coded, modulated, spread, and / or scrambled. Can be used to select a scheme. The symbols generated by the processor 1090 are used to create a frame structure. The processor 1090 creates this frame structure by multiplexing additional information and symbols, thereby obtaining a series of frames. The frame is then provided to transmitter 1056, which includes amplifying, filtering, and modulating the frame onto a carrier for downlink transmission over the wireless medium through one or more antennas 1052. Signal conditioning function.

  [0097] Uplink transmissions are processed at base station 1010 in a manner similar to that described in connection with the receiver function at access terminal 1050. Receiver 1035 receives uplink transmissions through one or more antennas 1034 and processes the transmissions to recover the information modulated onto the carriers. The information recovered by the receiver 1035 is provided to the processor 1040, which parses each frame. Processor 1040 reverses the processing performed by processor 1090 at access terminal 1050. The data and control signals carried by the successfully decoded frame can then be provided to the data sink 1039. If some of the frames fail to be decoded by the receiver processor, the controller / processor 1040 also uses an acknowledgment (ACK) and / or negative acknowledgment (NACK) protocol to support retransmission requests for those frames. obtain.

[0098] Controllers / processors 1040 and 1090 may be used to direct the operation at base station 1010 and access terminal 1050, respectively. For example, the controllers / processors 1040 and 1090 may provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Computer readable media in memories 1042 and 1092 may store data and software for base station 1010 and access terminal 1050, respectively.
Conclusion
[0099] While the aspects, arrangements, and embodiments described above have been described with specific details and characteristics, the components illustrated in one or more of FIGS. 4, 6, 7, 8, or 9 , Steps, features, and / or functions may be rearranged and / or combined into a single component, step, feature, or function, or embodied in several components, steps, or functions Can be done. Additional elements, components, steps, and / or functions may also be added or not utilized without departing from the teachings herein. The apparatus, device, and / or component shown in one or more of FIGS. 1, 5, or 10 is a method, feature described in one or more of FIGS. 4, 6, 7, 8, or 9. , Parameters, or steps may be configured to perform or use. The novel algorithms described herein can also be efficiently implemented in software and / or incorporated into hardware.

  [00100] It should also be noted that at least some implementations have been described as processes depicted as flowcharts, flow diagrams, structure diagrams, or block diagrams. Although a flowchart may describe the operation as a continuous process, many of the operations can be performed in parallel or concurrently. Furthermore, the order of operations can be rearranged. The process ends when its operation is complete. A process may correspond to a method, a function, a procedure, a subroutine, a subprogram, and so on. If the process corresponds to a function, its termination corresponds to the function returning to the calling function or the main function. Various methods described herein may be partially or completely by programming (eg, instructions and / or data) that can be stored on machine-readable storage media, computer-readable storage media, and / or processor-readable storage media. Can be implemented by one or more processors, machines, and / or devices.

  [00101] Those skilled in the art further understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein are hardware, software, firmware, middleware, It will be understood that it can be implemented as microcode, or any combination thereof. To clearly illustrate this compatibility, various illustrative components, blocks, modules, circuits, and steps are generally described above in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

  [00102] Various features described in this specification and associated with examples illustrated in the accompanying drawings can be implemented in different examples and implementations without departing from the scope of the present disclosure. Thus, although certain configurations and arrangements are illustrated and shown in the accompanying drawings, various other additions and modifications to the described embodiments, and deletions from the described embodiments, will occur to those skilled in the art. As will be apparent, such embodiments are merely illustrative and are not limited to the scope of the present disclosure. Accordingly, the scope of the present disclosure is determined solely by the literal language and legal equivalents of the following claims.

[00102] Various features described in this specification and associated with examples illustrated in the accompanying drawings can be implemented in different examples and implementations without departing from the scope of the present disclosure. Thus, although certain configurations and arrangements are illustrated and shown in the accompanying drawings, various other additions and modifications to the described embodiments, and deletions from the described embodiments, will occur to those skilled in the art. As will be apparent, such embodiments are merely illustrative and are not limited to the scope of the present disclosure. Accordingly, the scope of the present disclosure is determined solely by the literal language and legal equivalents of the following claims.
The invention described in the scope of claims at the beginning of the application will be appended.
[C1]
A wireless communication method,
Receiving a message identifying a list of active channels in the network;
Generating a subset list of channels by removing the at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels;
Identifying a channel from a subset list of the channel to establish communication with the network;
A method comprising:
[C2]
Determining that the access terminal does not support one or more channels listed in the list of channels;
Removing the one or more channels not supported by the access terminal from the list of channels;
The method of C1, further comprising:
[C3]
The method of C2, further comprising determining that the access terminal hardware does not support the one or more channels.
[C4]
The method of C1, further comprising storing an indication that each of the at least one channel from the list of channels is excluded from consideration for establishing the communication with the network.
[C5]
Calculating the amount of channels listed in the subset list of channels as a result of removal of the at least one channel from the list of channels;
Executing a hash algorithm to generate an index in the subset list of the channel;
The method of C1, wherein the amount of channels is an input parameter for the hash algorithm.
[C6]
The method of C1, further comprising removing the at least one channel without negotiating an enhanced voice data optimization (EVDO) session with a base station of the network.
[C7]
The method of C1, further comprising performing enhanced voice data optimization (EVDO) session negotiation with a base station of the network after the removal of the at least one channel from the list of channels.
[C8]
A device configured for wireless communication,
At least one processing circuit;
A memory coupled to the at least one processing circuit;
A communication interface coupled to the at least one processing circuit;
The at least one processing circuit comprises:
Receiving a message identifying a list of active channels in the network;
Generating a subset list of channels by removing the at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels;
Identifying a channel from a subset list of the channel to establish communication with the network;
An apparatus configured to perform.
[C9]
The at least one processing circuit further includes
Determining that the device does not support one or more channels listed in the list of channels;
Removing the one or more channels not supported by the device from the list of channels;
The apparatus according to C8, configured to perform:
[C10]
The apparatus of C9, wherein the at least one processing circuit is further configured to determine that hardware of the apparatus does not support the one or more channels.
[C11]
The at least one processing circuit is further configured to store an indication that each of the at least one channel from the list of channels is excluded from consideration for establishing the communication with the network. The apparatus according to C8.
[C12]
The at least one processing circuit is further configured to calculate an amount of channels listed in the subset list of channels as a result of the removal of the at least one channel from the list of channels;
The at least one processing circuit is further configured to execute a hash algorithm to generate an index in the subset list of the channel;
The apparatus of C8, wherein the amount of channels is an input parameter for the hash algorithm.
[C13]
The apparatus of C8, wherein the at least one processing circuit is further configured to remove the at least one channel without negotiating an enhanced voice data optimization (EVDO) session with a base station of the network.
[C14]
The at least one processing circuit is further configured to perform an extended voice data optimization (EVDO) session negotiation with a base station of the network after the removal of the at least one channel from the list of channels. The device according to C8.
[C15]
A device configured for wireless communication,
Means for receiving a message identifying a list of active channels in the network;
Means for generating a subset list of channels by removing the at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels;
Means for identifying a channel from a subset list of the channel to establish communication with the network;
An apparatus comprising:
[C16]
Means for determining that the device does not support one or more channels listed in the list of channels;
The apparatus of C15, wherein the means for generating is configured to remove the one or more channels that the apparatus does not support from the list of channels.
[C17]
The apparatus of C16, wherein the means for generating is configured to determine that the hardware of the apparatus does not support the one or more channels.
[C18]
Means for calculating the amount of channels listed in the subset list of channels as a result of the removal of the at least one channel from the list of channels;
The means for identifying the channel is configured to perform a hash algorithm to generate an index within a subset list of the channel;
The apparatus of C15, wherein the channel quantity is an input parameter for the hash algorithm.
[C19]
The means for generating the subset list of channels is configured to remove the at least one channel without negotiating an enhanced voice data optimization (EVDO) session with a base station of the network. Equipment.
[C20]
The apparatus of C15, further comprising means for performing enhanced voice data optimization (EVDO) session negotiation with a base station of the network after the removal of the at least one channel from the list of channels.
[C21]
Product,
In communication device,
Receiving a message identifying a list of active channels in the network;
Generating a subset list of channels by removing the at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels;
A computer readable storage device comprising code for causing a channel to be identified from a subset list of the channel to establish communication with the network
With a product.
[C22]
The computer readable medium further includes the communication device,
Determining that the access terminal does not support one or more channels listed in the list of channels;
Removing the one or more channels not supported by the access terminal from the list of channels;
The product of C21, comprising a code for performing
[C23]
The product of C22, wherein the computer-readable medium further comprises code for causing the communication device to determine that the access terminal hardware does not support the one or more channels.
[C24]
The computer-readable medium further causes the communication device to calculate the amount of channels listed in the subset list of channels as a result of the removal of the at least one channel from the list of channels. With a code for
The computer-readable medium further comprises code for causing the communication device to perform a hash algorithm to generate an index in the subset list of the channel;
The product of C21, wherein the channel quantity is an input parameter for the hash algorithm.
[C25]
The computer-readable medium further comprises code for causing the communication device to remove the at least one channel without negotiating an enhanced voice data optimization (EVDO) session with a base station of the network, C21 Product described in.
[C26]
The computer-readable medium further performs an enhanced voice data optimization (EVDO) session negotiation with the base station of the network after the removal of the at least one channel from the list of channels to the communication device. A product according to C21, comprising a cord for causing

Claims (26)

A wireless communication method,
Receiving a message identifying a list of active channels in the network;
Generating a subset list of channels by removing the at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels;
Identifying a channel from a subset list of the channel to establish communication with the network. Determining that the access terminal does not support one or more channels listed in the list of channels;
The method of claim 1, further comprising: removing from the list of channels the one or more channels that the access terminal does not support.   The method of claim 2, further comprising determining that the access terminal hardware does not support the one or more channels.   The method of claim 1, further comprising storing an indication that each of the at least one channel from the list of channels is excluded from consideration for establishing the communication with the network. Calculating the amount of channels listed in the subset list of channels as a result of removal of the at least one channel from the list of channels;
Executing a hash algorithm to generate an index in the subset list of the channel;
The method of claim 1, wherein the amount of channels is an input parameter for the hash algorithm.   The method of claim 1, further comprising removing the at least one channel without negotiating an enhanced voice data optimization (EVDO) session with a base station of the network.   The method of claim 1, further comprising performing enhanced voice data optimization (EVDO) session negotiation with a base station of the network after the removal of the at least one channel from the list of channels. A device configured for wireless communication,
At least one processing circuit;
A memory coupled to the at least one processing circuit;
A communication interface coupled to the at least one processing circuit;
The at least one processing circuit comprises:
Receiving a message identifying a list of active channels in the network;
Generating a subset list of channels by removing the at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels;
An apparatus configured to identify a channel from a subset list of the channel to establish communication with the network. The at least one processing circuit further includes
Determining that the device does not support one or more channels listed in the list of channels;
9. The apparatus of claim 8, configured to: remove the one or more channels that the apparatus does not support from the list of channels.   The apparatus of claim 9, wherein the at least one processing circuit is further configured to determine that hardware of the apparatus does not support the one or more channels.   The at least one processing circuit is further configured to store an indication that each of the at least one channel from the list of channels is excluded from consideration for establishing the communication with the network. The apparatus according to claim 8. The at least one processing circuit is further configured to calculate an amount of channels listed in the subset list of channels as a result of the removal of the at least one channel from the list of channels;
The at least one processing circuit is further configured to execute a hash algorithm to generate an index in the subset list of the channel;
The apparatus of claim 8, wherein the channel quantity is an input parameter for the hash algorithm.   The apparatus of claim 8, wherein the at least one processing circuit is further configured to remove the at least one channel without negotiating an enhanced voice data optimization (EVDO) session with a base station of the network.   The at least one processing circuit is further configured to perform an extended voice data optimization (EVDO) session negotiation with a base station of the network after the removal of the at least one channel from the list of channels. The apparatus according to claim 8. A device configured for wireless communication,
Means for receiving a message identifying a list of active channels in the network;
Means for generating a subset list of channels by removing the at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels;
Means for identifying a channel from a subset list of the channel to establish communication with the network. Means for determining that the device does not support one or more channels listed in the list of channels;
The apparatus of claim 15, wherein the means for generating is configured to remove the one or more channels not supported by the apparatus from the list of channels.   The apparatus of claim 16, wherein the means for generating is configured to determine that the hardware of the apparatus does not support the one or more channels. Means for calculating the amount of channels listed in the subset list of channels as a result of the removal of the at least one channel from the list of channels;
The means for identifying the channel is configured to perform a hash algorithm to generate an index within a subset list of the channel;
The apparatus of claim 15, wherein the channel quantity is an input parameter for the hash algorithm.   16. The means for generating the subset list of channels is configured to remove the at least one channel without negotiating an enhanced voice data optimization (EVDO) session with a base station of the network. The device described in 1.   The apparatus of claim 15, further comprising means for performing enhanced voice data optimization (EVDO) session negotiation with a base station of the network after the removal of the at least one channel from the list of channels. Product,
In communication device,
Receiving a message identifying a list of active channels in the network;
Generating a subset list of channels by removing the at least one channel from the list of channels without negotiating with the network to remove at least one channel from the list of channels;
A computer-readable storage device comprising code for causing a channel to be identified from a subset list of the channel to establish communication with the network. The computer readable medium further includes the communication device,
Determining that the access terminal does not support one or more channels listed in the list of channels;
The product of claim 21, comprising code for causing the one or more channels not supported by the access terminal to be removed from the list of channels.   23. The product of claim 22, wherein the computer readable medium further comprises code for causing the communication device to determine that the access terminal hardware does not support the one or more channels. The computer-readable medium further causes the communication device to calculate the amount of channels listed in the subset list of channels as a result of the removal of the at least one channel from the list of channels. With a code for
The computer-readable medium further comprises code for causing the communication device to perform a hash algorithm to generate an index in the subset list of the channel;
The product of claim 21, wherein the channel quantity is an input parameter for the hash algorithm.   The computer-readable medium further comprises code for causing the communication device to remove the at least one channel without negotiating an enhanced voice data optimization (EVDO) session with a base station of the network. Item 22. The product according to Item 21.   The computer-readable medium further performs an enhanced voice data optimization (EVDO) session negotiation with the base station of the network after the removal of the at least one channel from the list of channels to the communication device. The product of claim 21, comprising a cord for causing

Images